Amino acids and acylcarnitine production by Chlorella vulgaris and Chlorella sorokiniana microalgae from wastewater culture

PeerJ

article

Juan M. Ballesteros-Torres¹  Luis Samaniego-Moreno²  Ricardo Gomez-Flores¹  Reyes S. Tamez-Guerra¹  Cristina Rodríguez-Padilla¹  Patricia Tamez-Guerra¹ 

[1] Facultad de Ciencias Biologicas ,(FCB), Departamento de Microbiología e Inmunología, Ave. Universidad s/n, Cd. Universitaria, Universidad Autónoma de Nuevo León;Departamento de Riego y Drenaje, Laboratorio de Calidad de Aguas, Universidad Autónoma Agraria “Antonio Narro”

关键词: Chlorella vulgaris;    Chlorella sorokiniana;    Metabolomics;    Growth conditions;    Acylcarnitines;    Amino acids;   

DOI  :  10.7717/peerj.7977

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundMicroalgae are a widely distributed group of prokaryotic and eukaryotic photosynthetic microorganisms that use a number of substances present in wastewater to produce a variety of biotechnological and nutritional biomolecules.MethodsProduction ofamino acids and acylcarnitine by Chlorella vulgaris and Chlorella sorokiniana was determined after 13 d of culture in wastewater, under various culture conditions. Wastewater was collected from “La Encantada” stream, located in Saltillo, Coahuila, Mexico. Microalgae was cultured at 23°C and natural day light, including the use of the following conditions: (1) extra light (12:12 light:dark cycles, 1,380 lumens), (2) agitation (130 rpm), and (3) both conditions, until exponential phase. Supernatant products were then analyzed by liquid chromatograph coupled to mass spectrometry. In addition, metabolomic profiles related to growing conditions were evaluated.ResultsAmino acids and acylcarnitine production by C. sorokiniana and C. vulgaris resulted in higher Ala and Leu concentrations by C. vulgaris compared with control, where control produced Gly and Pro in higher amounts compared with C. sorokiniana. Tyr, Phe, Val, and Cit were detected in lower amounts under light and shaking culture conditions. High concentrations of C0 acylcarnitines were produced by both microalgae compared with control, where C. sorokiniana production was independent of culture conditions, whereas C. vulgaris one was stimulated by shaking. C4 production was higher by C. sorokiniana compared with control. Furthermore, C4, C6DC, C14:1, C14:2, and C18:1OH production by microalga was low in all culture conditions.ConclusionMicroalgae produced essential amino acids and nutritionally important carnitines from wastewater. In addition, C. sorokiniana biomass has higher potential as animal nutrient supplement, as compared with that of C. vulgaris.

【 授权许可】

CC BY